放射性固体废物水泥砂浆固定配方研究

Formulation for Immobilization of Radioactive Solid Waste With Cement Mortar

本工作主要研究中、低放固体废物超级压缩饼在2m3废物包装箱内的固定配方。该配方能够保证最终废物体的整体性和整体强度满足安全运输、储存和处置的要求,并且能够进行工程应用。通过实验研究水灰比、灰砂比、砂子级配以及添加剂加入量等因素对流动度、凝结时间、固化过程中的温升、固化体性能等的影响规律,根据规律筛选出既满足核行业标准(EJ1186-2005)又适用于现有工程装置的放射性固体废物水泥砂浆固定配方,即在室温25℃,常压下,配方为0.450∶1水灰比、1∶1.6灰砂比、1∶2∶1粗中细砂比、1‰(质量分数)B型缓凝剂。

The immobilization formulation of cement mortar for the super-compressed pies in the boxes was studied,which are the retrieval intermediate and low level radioactive solid waste after super compressed.The immobilization formulation can meet the requirements of safe transportation,storage and disposal,and ensure to be used in engineering.By investigating the factors,including water cement ratio,cement sand ratio,sand size distribution and the additives amount,on the characterization of cement mortar,such as the fluidity,the setting time,the temperature rise and the performances of the solidified bodies,the immobilization formulation meet the nuclear industry standard（EJ1186-2005）,and is suitable for the existing engineering device.The formulation includs 0.450∶1water cement ratio,1∶1.6cement sand ratio,1∶2∶1sand size distribution and 1‰（mass fraction）the retarder.